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chaotic

Joined:

Jun 14

Posts: 6

chaotic says:

2007 Hyosung GT250 not starting

Ive got a 2007 Hyosung GT250 that won't start. It sat for about 7 months. I replaced the battery, plugs, oil & filter. I also replaced a bad fuel petcock. Cleaned the carbs. But it will not start, only turn over. Any ideas???

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  • Posted 103 days ago (21 June 2014 00:17)

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jaffa90

Joined:

Mar 09

Posts: 8944

jaffa90 says:

no start

Welcome chaotic :blink:, if it turns over briskly are the plugs wet with fuel?

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geoffart

Joined:

Apr 08

Posts: 1036

geoffart says:

sleeping bikes that wont wake up

I'm certainly no bike mech (far from it)... but, a shot in the dark, have you tried bump starting down a very long hill.  Sometimes my lower capacity bike doesn't get used for a few months and I really, really have to keep the engine turning over to get it to start again. 


For example, I have a YBR that just sits in the garage a lot of the time. Sometimes it simply will not start, even with the kick start. So, I take it to the top of a very large hill and wait until speed builds and then keep trying to get it started that way. Sometimes I have to climb the hill several times before it will start, yet a full service confirmed there's not obviously wrong with the bike. 

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chaotic

Joined:

Jun 14

Posts: 6

chaotic says:

2007 Hyosung

They were a little wet but not bad. I did a spark check & they both have spark.

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jaffa90

Joined:

Mar 09

Posts: 8944

jaffa90 says:

no start

Have you tried EASYSTART spray direct into the air box?

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kcmc

Joined:

Jan 08

Posts: 7607

kcmc says:

Easystart Should suggest that to Geoffart

as well Jaffa mate, running up and down them there hills, hope he's fit, be givin himself a heart attack:lol:

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chaotic

Joined:

Jun 14

Posts: 6

chaotic says:

2007 Hyosung

Starting spray got it going but as soon as I put the tank back on I'm back to square one. Fuel pump working. Opened the carb & fuel came out so I know it's getting fuel.

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kcmc

Joined:

Jan 08

Posts: 7607

kcmc says:

Hyosung GT 250 2007

Hi Chaotic

( Opened the carb & fuel came out so I know it's getting fuel.)

Just because there is fuel in the float bowls doesn't mean it will always get into the intake, if the jets are still blocked or a slide needle has dropped or the float heights have been disturbed when you stripped cleaned and rebuilt, also low fuel pressure .

 (I also replaced a bad fuel petcock)

"Why'' what was the problem with the fuel cock? the tap on your bike is a diaphragm only type, have you reconnected the vacuum pipe? and not kinked it when refitting the fuel tank(this could cause low fuel pressure or no fuel to flow)

KC :tongue:



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jaffa90

Joined:

Mar 09

Posts: 8944

jaffa90 says:

jets

You have just proved that the engine is not getting fuel.

Did you clean/check all the jets and made sure no unwanted air is getting in?

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chaotic

Joined:

Jun 14

Posts: 6

chaotic says:

2007 Hyosung

The fuel tank had alot of rust. I cleaned the tank but the petcock was bad. Even after I took apart & cleaned the petcock started to leak. I'm not the one who cleaned the carb but he told me that he rejetted it.

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chaotic

Joined:

Jun 14

Posts: 6

chaotic says:

2007 Hyosung

I've checked all the lines & I'm definitely noy getting fuel to the cylinders. It looks like the carbs will have to come off again for another look.

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